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J.I. Case 780 Construction King

J.I. Case 780 Construction King tractor
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The J.I. Case 780 Construction King is a backhoe loader tractor produced from 1971 to 1981. It features a 5.5L 4-cylinder diesel engine producing 120 hp gross and 111 hp net. The tractor has a two-speed power shift transmission with torque converter and power shuttle, two-wheel drive, and outboard planetary final drives. It includes pneumatic drum brakes and power steering, with a standard cab and optional heater. The hydraulic system has a capacity of 46 gallons with a total pump flow of 58 gpm. Dimensions include an 87-inch wheelbase, 295-inch length, and 93-inch width at rear wheels. The tractor weighs between 21,000 and 23,200 pounds depending on configuration. Attachments include a front-end loader with a 6,400 lbs lift capacity and a J.I. Case 18-foot or Extendahoe backhoe with digging depths up to 264 inches.
J.I. Case 780Construction Kingbackhoe loadertractorspecificationsenginetransmissionhydraulicsdimensionsattachments
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Model780

Technical Specifications

Detailed specifications and technical data for J.I. Case 780 Construction King

Power

Engine (net):111 hp (82.8 kW)
Engine (gross):120 hp (89.5 kW)

Tires

Other rear:18.4x28
Other front:14.00x17.5
Additional rear:21Lx24
Industrial rear:18.4x24
Industrial front:9.00x20

Engine

Type:diesel
Model:J.I. Case A336 BDT
Torque:329 lb-ft (446.1 Nm)
Cooling:liquid-cooled
Starter:electric
Cylinders:4-cylinder
Rated RPM:2200
Torque RPM:1500
Air cleaner:dry
Bore/Stroke:4.625x5.00 inches (117 x 127 mm)
Fuel system:direct injection
Power (net):111 hp (82.8 kW)
Displacement:336 ci (5.5 L)
Oil capacity:11 qts (10.4 L)
Power (gross):120 hp (89.5 kW)
Starter volts:24
Coolant capacity:26 qts (24.6 L)
Compression ratio:16.5:1

Weight

Shipping:21000 lbs (9525 kg)
Max front axle static:17000 lbs (7711 kg)
Shipping (Extendahoe):23200 lbs (10523 kg)
Max front axle dynamic:68000 lbs (30844 kg)

Capacity

Fuel:35 gal (132.5 L)
Hydraulic system:46 gal (174.1 L)

Dimensions

Width:93 inches (236 cm) (Width of tractor at rear wheels)
Length:295 inches (749 cm)
Wheelbase:87 inches (220 cm)
Rear tread:74.5 inches (189 cm)
Front tread:78 inches (198 cm)
Height (cab):117 inches (297 cm)
Height (backhoe):159 inches (403 cm)
Length (Extendahoe):297 inches (754 cm)
Clearance (rear axle):15.5 inches (39 cm)
Height (steering wheel):86 inches (218 cm)

Electrical

Batteries:2
Battery AH:95
Battery volts:12
Charging amps:35
Charging system:alternator

Hydraulics

Capacity:46 gal (174.1 L)
Pump flow:35 gpm (main pump) (132.5 lpm)
Total flow:58 gpm (219.5 lpm)
Secondary pump flow:23 gpm (87.1 lpm)

Mechanical

Cab:standard with optional heater
Drive:Two-wheel drive
Brakes:Pneumatic drum brakes
Final drives:outboard planetary
Power steering:Yes

Production

Type:Backhoe loader tractor
Years made:1971 - 1981
Manufacturer:J.I. Case

Attachments

Loader

Dump time:2.4s
Dump angle:52°
Lower time:5.1s
Raise time:7.2s
Bucket width:95 inches (241 cm)
Breakout force:16000 lbs (7257 kg)
Reach (dumped):39.875 inches (101 cm)
Reach (ground):71.5 inches (181 cm)
Height (at pin):131.5 inches (334 cm)
Clearance (dumped):106 inches (269 cm)
Rollback (ground line):37°
Lift capacity (full at pin):6400 lbs (2903 kg)
Attachment overview:Front-end loader, Backhoe

J.I. Case 18-foot Backhoe

Swing Arc:180°
Backhoe type:J.I. Case 18-foot Backhoe
Bucket force:13332 lbs (6047 kg)
Digging depth:220 inches (558 cm)
Loading height:152.5 inches (387 cm)
Bucket Rotation:155°
Reach from pivot:270.5 inches (687 cm)
Transport height:159 inches (403 cm)
Dipperstick force:10836 lbs (4915 kg)
2-Foot flat digging depth:218 inches (553 cm)

J.I. Case Extendahoe Backhoe

Swing Arc:180°
Backhoe type:J.I. Case Extendahoe Backhoe
Bucket Rotation:156°
Transport height:160 inches (406 cm)
Bucket force (extended stick):13450 lbs (6100 kg)
Bucket force (retracted stick):13450 lbs (6100 kg)
Digging depth (extended stick):264 inches (670 cm)
Digging depth (retracted stick):216 inches (548 cm)
Reach from pivot (extended stick):317 inches (805 cm)
Dipperstick force (extended stick):7992 lbs (3625 kg)
Reach from pivot (retracted stick):271 inches (688 cm)
Dipperstick force (retracted stick):10670 lbs (4839 kg)

Transmission

Type:power shift
Gears:2 forward and reverse
Description:Two-speed power shift transmission with torque converter and power shuttle.
Oil capacity:20 qts (18.9 L)

Backhoe & Loader

Dig depth:220 inches (558 cm)
Dump angle:52 inches (132 cm)

Related Models

J.I. Case 780B

Model:780B